const STORAGE_KEY = 'mall';

export default {
    setItem(key,value,module_name){
        if(module_name){
            let val = this.getItem(module_name);
            val[key] = value;
            this.setItem(module_name,val)
        }else{
            let val = this.getStorage();
            val[key] = value;
            window.sessionStorage.setItem(STORAGE_KEY,JSON.stringify(val))
        }
    },
    getItem(key,module_name){
        if(module_name){
            let val = this.getItem(module_name);
            if(val){
                return val[key]
            }
        }
        return this.getStorage()[key]
    },
    getStorage(){
        return JSON.parse(window.sessionStorage.getItem(STORAGE_KEY) || '{}')
    },
    clear(key,module_name){
        let val = this.getStorage();
        if(module_name){
            if(!val[module_name])return;
            delete val[module_name][key]
        }else{
            delete val[key]
        }
        window.sessionStorage.setItem(STORAGE_KEY,JSON.stringify(val))
        
    }
}